Answers

Issue can be that the transform is marked Windows Installer 3.n only (in my example, Schema 301), and it's attempting execution on a PC with Windows Installer 2 only on it. DEBUG: Error 2759: Transform C:\WINNT\Installer\blahblah.mst version 301 incompatible with engineSolution: Install Windows installer 3.1 on the PC ( WindowsInstaller-KB893803-v2-x86.exe ) and re-try.